I've been in the zone since I joined Dec 17, 2005

Slow-Paced shooters, (Project Reality, Darkest Hour, ArmA 2/3) and Realistic WW2 RTS's (Men of War with the Dynamic Campaign Generator mod, Company of heroes with Blitzkrieg, Battle of the Bulge, or Normandy '44 mod) When I feel nostalgic I play Day of Defeat (not source) and UT99 and the Infiltration mod for it.